Assessment of serum levels of granulocyte-macrophage colony-stimulating factor (GM-CSF) among non-segmental vitiligo patients: a pilot study

Introduction: Granulocyte-macrophage colony-stimulating factor (GM-CSF) is an essential factor in the growth and maturation of blood cells as well as modulation of the immune system. Few studies have investigated its involvement in the development of vitiligo, and no studies have been performed on Egyptian patients. Aim: To assess GM-CSF serum level among non-segmental Egyptian vitiligo patients and to determine its possible role in the etiopathogenesis of the disease. Methods: Forty patients with non-segmental vitiligo and 40 age-and sex-matched subjects were assessed for levels of GM-CSF in serum using the ELISA technique. Results: The patients in this study showed lower levels of GM-CSF in serum compared to controls (mean +/- SD was 33.4 +/- 5.7 pg/ml versus 63.4 +/- 7.4 pg/ml, respectively, p = 0.0001). No appreciable relation was detected between levels of GM-CSF in serum and age, sex, family history, and stressful events or disease activity, type, and extent, p > 0.05. Conclusions: GM-CSF serum level may be one of the determinants of the autoimmune hypothesis in the etiopathogenesis of non-segmental vitiligo.